1520736428 has 12 divisors (see below), whose sum is σ = 2817835272. Its totient is φ = 715640640.

The previous prime is 1520736407. The next prime is 1520736431. The reversal of 1520736428 is 8246370251.

It is a happy number.

It is a super-4 number, since 4×1520736428⁴ (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1520736391 and 1520736400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11181818 + ... + 11181953.

It is an arithmetic number, because the mean of its divisors is an integer number (234819606).

Almost surely, 2^1520736428 is an apocalyptic number.

It is an amenable number.

1520736428 is a deficient number, since it is larger than the sum of its proper divisors (1297098844).

1520736428 is a wasteful number, since it uses less digits than its factorization.

1520736428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22363792 (or 22363790 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1520736428 is about 38996.6207253911. The cubic root of 1520736428 is about 1149.9650721591.

The spelling of 1520736428 in words is "one billion, five hundred twenty million, seven hundred thirty-six thousand, four hundred twenty-eight".