56405428 has 6 divisors (see below), whose sum is σ = 98709506. Its totient is φ = 28202712.

The previous prime is 56405413. The next prime is 56405431. The reversal of 56405428 is 82450465.

It can be written as a sum of positive squares in only one way, i.e., 55980324 + 425104 = 7482^2 + 652^2 .

It is a junction number, because it is equal to n+sod(n) for n = 56405393 and 56405402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7050675 + ... + 7050682.

Almost surely, 2^56405428 is an apocalyptic number.

It is an amenable number.

56405428 is a deficient number, since it is larger than the sum of its proper divisors (42304078).

56405428 is a wasteful number, since it uses less digits than its factorization.

56405428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14101361 (or 14101359 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 56405428 is about 7510.3547186534. The cubic root of 56405428 is about 383.5072981448.

The spelling of 56405428 in words is "fifty-six million, four hundred five thousand, four hundred twenty-eight".