400361020 has 24 divisors (see below), whose sum is σ = 855010800. Its totient is φ = 157429632.

The previous prime is 400360969. The next prime is 400361029. The reversal of 400361020 is 20163004.

It is a junction number, because it is equal to n+sod(n) for n = 400360985 and 400361003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400361029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168465 + ... + 170824.

It is an arithmetic number, because the mean of its divisors is an integer number (35625450).

Almost surely, 2^400361020 is an apocalyptic number.

It is an amenable number.

400361020 is an abundant number, since it is smaller than the sum of its proper divisors (454649780).

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

400361020 is a wasteful number, since it uses less digits than its factorization.

400361020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339357 (or 339355 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 400361020 is about 20009.0234644272. The cubic root of 400361020 is about 737.0279012479.

The spelling of 400361020 in words is "four hundred million, three hundred sixty-one thousand, twenty".