56403020 has 24 divisors (see below), whose sum is σ = 124681200. Its totient is φ = 21373632.

The previous prime is 56402993. The next prime is 56403023. The reversal of 56403020 is 2030465.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 56402983 and 56403001.

It is not an unprimeable number, because it can be changed into a prime (56403023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73835 + ... + 74594.

It is an arithmetic number, because the mean of its divisors is an integer number (5195050).

Almost surely, 2^56403020 is an apocalyptic number.

It is an amenable number.

56403020 is an abundant number, since it is smaller than the sum of its proper divisors (68278180).

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

56403020 is a wasteful number, since it uses less digits than its factorization.

56403020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148457 (or 148455 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 56403020 is about 7510.1944049405. The cubic root of 56403020 is about 383.5018406398.

Adding to 56403020 its reverse (2030465), we get a palindrome (58433485).

The spelling of 56403020 in words is "fifty-six million, four hundred three thousand, twenty".