400244502 has 32 divisors (see below), whose sum is σ = 918173952. Its totient is φ = 113939424.

The previous prime is 400244497. The next prime is 400244513. The reversal of 400244502 is 205442004.

It is a super-2 number, since 2×400244502² = 320391322762456008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5568 + ... + 28835.

It is an arithmetic number, because the mean of its divisors is an integer number (28692936).

Almost surely, 2^400244502 is an apocalyptic number.

400244502 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

400244502 is an abundant number, since it is smaller than the sum of its proper divisors (517929450).

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

400244502 is a wasteful number, since it uses less digits than its factorization.

400244502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34692.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 400244502 is about 20006.1116162037. Note that the first 3 decimals coincide. The cubic root of 400244502 is about 736.9563946617.

Adding to 400244502 its reverse (205442004), we get a palindrome (605686506).

The spelling of 400244502 in words is "four hundred million, two hundred forty-four thousand, five hundred two".