311030040 has 32 divisors (see below), whose sum is σ = 933090480. Its totient is φ = 82941312.

The previous prime is 311030003. The next prime is 311030063. The reversal of 311030040 is 40030113.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 311029998 and 311030025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1295839 + ... + 1296078.

Almost surely, 2^311030040 is an apocalyptic number.

311030040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311030040 is an abundant number, since it is smaller than the sum of its proper divisors (622060440).

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

311030040 is a wasteful number, since it uses less digits than its factorization.

311030040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591931 (or 2591927 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 311030040 is about 17636.0437740441. The cubic root of 311030040 is about 677.5387086810.

Adding to 311030040 its reverse (40030113), we get a palindrome (351060153).

The spelling of 311030040 in words is "three hundred eleven million, thirty thousand, forty".