400773540 has 48 divisors (see below), whose sum is σ = 1130754240. Its totient is φ = 106055040.

The previous prime is 400773509. The next prime is 400773553. The reversal of 400773540 is 45377004.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 400773498 and 400773507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17635 + ... + 33354.

It is an arithmetic number, because the mean of its divisors is an integer number (23557380).

Almost surely, 2^400773540 is an apocalyptic number.

It is an amenable number.

400773540 is an abundant number, since it is smaller than the sum of its proper divisors (729980700).

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

400773540 is a wasteful number, since it uses less digits than its factorization.

400773540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51132 (or 51130 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 400773540 is about 20019.3291595897. The cubic root of 400773540 is about 737.2809515119.

The spelling of 400773540 in words is "four hundred million, seven hundred seventy-three thousand, five hundred forty".