407992 has 16 divisors (see below), whose sum is σ = 824040. Its totient is φ = 188256.

The previous prime is 407977. The next prime is 407993. The reversal of 407992 is 299704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407993) 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, 1858 + ... + 2065.

2⁴⁰⁷⁹⁹² is an apocalyptic number.

It is an amenable number.

407992 is an abundant number, since it is smaller than the sum of its proper divisors (416048).

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

407992 is a wasteful number, since it uses less digits than its factorization.

407992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942 (or 3938 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 407992 is about 638.7425146332. The cubic root of 407992 is about 74.1681106201.

The spelling of 407992 in words is "four hundred seven thousand, nine hundred ninety-two".