400494960 has 60 divisors (see below), whose sum is σ = 1344997992. Its totient is φ = 106798464.

The previous prime is 400494923. The next prime is 400494967. The reversal of 400494960 is 69494004.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400494967) 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, 277402 + ... + 278841.

Almost surely, 2^400494960 is an apocalyptic number.

400494960 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400494960 is an abundant number, since it is smaller than the sum of its proper divisors (944503032).

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

400494960 is a wasteful number, since it uses less digits than its factorization.

400494960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556262 (or 556253 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 400494960 is about 20012.3701744696. The cubic root of 400494960 is about 737.1100825007.

The spelling of 400494960 in words is "four hundred million, four hundred ninety-four thousand, nine hundred sixty".