1478021040 has 80 divisors (see below), whose sum is σ = 5090968800. Its totient is φ = 394138368.

The previous prime is 1478021023. The next prime is 1478021053. The reversal of 1478021040 is 401208741.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1478020995 and 1478021013.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339975 + ... + 344294.

It is an arithmetic number, because the mean of its divisors is an integer number (63637110).

Almost surely, 2^1478021040 is an apocalyptic number.

1478021040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1478021040 is an abundant number, since it is smaller than the sum of its proper divisors (3612947760).

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

1478021040 is a wasteful number, since it uses less digits than its factorization.

1478021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684291 (or 684279 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 1478021040 is about 38445.0392118411. The cubic root of 1478021040 is about 1139.0956817206.

Adding to 1478021040 its reverse (401208741), we get a palindrome (1879229781).

The spelling of 1478021040 in words is "one billion, four hundred seventy-eight million, twenty-one thousand, forty".