42400428 has 24 divisors (see below), whose sum is σ = 113068032. Its totient is φ = 12114384.

The previous prime is 42400427. The next prime is 42400459. The reversal of 42400428 is 82400424.

It is a junction number, because it is equal to n+sod(n) for n = 42400398 and 42400407.

It is not an unprimeable number, because it can be changed into a prime (42400427) 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, 252300 + ... + 252467.

It is an arithmetic number, because the mean of its divisors is an integer number (4711168).

Almost surely, 2^42400428 is an apocalyptic number.

It is an amenable number.

42400428 is an abundant number, since it is smaller than the sum of its proper divisors (70667604).

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

42400428 is a wasteful number, since it uses less digits than its factorization.

42400428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504781 (or 504779 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 42400428 is about 6511.5611031457. The cubic root of 42400428 is about 348.7038535568.

The spelling of 42400428 in words is "forty-two million, four hundred thousand, four hundred twenty-eight".