403700040 has 48 divisors (see below), whose sum is σ = 1312026300. Its totient is φ = 107653248.

The previous prime is 403699997. The next prime is 403700041. The reversal of 403700040 is 40007304.

It can be written as a sum of positive squares in 2 ways, for example, as 373030596 + 30669444 = 19314^2 + 5538^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 403699986 and 403700022.

It is not an unprimeable number, because it can be changed into a prime (403700041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 560335 + ... + 561054.

Almost surely, 2^403700040 is an apocalyptic number.

403700040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403700040 is an abundant number, since it is smaller than the sum of its proper divisors (908326260).

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

403700040 is a wasteful number, since it uses less digits than its factorization.

403700040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121406 (or 1121399 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 403700040 is about 20092.2880727905. The cubic root of 403700040 is about 739.0711745619.

Adding to 403700040 its reverse (40007304), we get a palindrome (443707344).

The spelling of 403700040 in words is "four hundred three million, seven hundred thousand, forty".