400919892 has 12 divisors (see below), whose sum is σ = 935479776. Its totient is φ = 133639960.

The previous prime is 400919879. The next prime is 400919899. The reversal of 400919892 is 298919004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400919899) 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, 16704984 + ... + 16705007.

It is an arithmetic number, because the mean of its divisors is an integer number (77956648).

Almost surely, 2^400919892 is an apocalyptic number.

It is an amenable number.

400919892 is an abundant number, since it is smaller than the sum of its proper divisors (534559884).

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

400919892 is a wasteful number, since it uses less digits than its factorization.

400919892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33409998 (or 33409996 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 400919892 is about 20022.9840932864. The cubic root of 400919892 is about 737.3706858209.

The spelling of 400919892 in words is "four hundred million, nine hundred nineteen thousand, eight hundred ninety-two".