312090040 has 16 divisors (see below), whose sum is σ = 702202680. Its totient is φ = 124836000.

The previous prime is 312089977. The next prime is 312090041. The reversal of 312090040 is 40090213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312090041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3901086 + ... + 3901165.

Almost surely, 2^312090040 is an apocalyptic number.

It is an amenable number.

312090040 is an abundant number, since it is smaller than the sum of its proper divisors (390112640).

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

312090040 is a wasteful number, since it uses less digits than its factorization.

312090040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7802262 (or 7802258 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 312090040 is about 17666.0703043999. The cubic root of 312090040 is about 678.3075269169.

The spelling of 312090040 in words is "three hundred twelve million, ninety thousand, forty".