1499977440 has 480 divisors, whose sum is σ = 5916667680. Its totient is φ = 355332096.

The previous prime is 1499977429. The next prime is 1499977511. The reversal of 1499977440 is 447799941.

1499977440 is a `hidden beast` number, since 1 + 49 + 99 + 77 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4885767 + ... + 4886073.

It is an arithmetic number, because the mean of its divisors is an integer number (12326391).

Almost surely, 2^1499977440 is an apocalyptic number.

1499977440 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 1499977440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2958333840).

1499977440 is an abundant number, since it is smaller than the sum of its proper divisors (4416690240).

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

1499977440 is a wasteful number, since it uses less digits than its factorization.

1499977440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 1499977440 is about 38729.5422126314. The cubic root of 1499977440 is about 1144.7085036905.

The spelling of 1499977440 in words is "one billion, four hundred ninety-nine million, nine hundred seventy-seven thousand, four hundred forty".