1497421440 has 384 divisors, whose sum is σ = 5499187200. Its totient is φ = 374685696.

The previous prime is 1497421439. The next prime is 1497421481. The reversal of 1497421440 is 441247941.

1497421440 is a `hidden beast` number, since 149 + 74 + 2 + 1 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1497421395 and 1497421404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11790657 + ... + 11790783.

It is an arithmetic number, because the mean of its divisors is an integer number (14320800).

Almost surely, 2^1497421440 is an apocalyptic number.

1497421440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1497421440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2749593600).

1497421440 is an abundant number, since it is smaller than the sum of its proper divisors (4001765760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1497421440 is a wasteful number, since it uses less digits than its factorization.

1497421440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 1497421440 is about 38696.5300769979. The cubic root of 1497421440 is about 1144.0579298098.

The spelling of 1497421440 in words is "one billion, four hundred ninety-seven million, four hundred twenty-one thousand, four hundred forty".