400260400 has 30 divisors (see below), whose sum is σ = 961626572. Its totient is φ = 160104000.

The previous prime is 400260397. The next prime is 400260401. The reversal of 400260400 is 4062004.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (400260401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 499926 + ... + 500725.

Almost surely, 2^400260400 is an apocalyptic number.

400260400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400260400 is an abundant number, since it is smaller than the sum of its proper divisors (561366172).

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

400260400 is a wasteful number, since it uses less digits than its factorization.

400260400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000669 (or 1000658 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400260400 is about 20006.5089408422. The cubic root of 400260400 is about 736.9661520122.

The spelling of 400260400 in words is "four hundred million, two hundred sixty thousand, four hundred".