42403816 has 96 divisors (see below), whose sum is σ = 102128040. Its totient is φ = 16353792.

The previous prime is 42403807. The next prime is 42403817. The reversal of 42403816 is 61830424.

It can be written as a sum of positive squares in 4 ways, for example, as 29658916 + 12744900 = 5446^2 + 3570^2 .

It is a super-2 number, since 2×42403816² = 3596167222723712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

42403816 is a modest number, since divided by 3816 gives 424 as remainder.

It is not an unprimeable number, because it can be changed into a prime (42403817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270010 + ... + 270166.

Almost surely, 2^42403816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42403816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51064020).

42403816 is an abundant number, since it is smaller than the sum of its proper divisors (59724224).

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

42403816 is a wasteful number, since it uses less digits than its factorization.

42403816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 42403816 is about 6511.8212506180. The cubic root of 42403816 is about 348.7131410196.

The spelling of 42403816 in words is "forty-two million, four hundred three thousand, eight hundred sixteen".