400002023100 has 36 divisors (see below), whose sum is σ = 1157339187704. Its totient is φ = 106667206080.

The previous prime is 400002023059. The next prime is 400002023123. The reversal of 400002023100 is 1320200004.

It is a super-2 number, since 2×400002023100² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 666669739 + ... + 666670338.

Almost surely, 2^400002023100 is an apocalyptic number.

It is an amenable number.

400002023100 is an abundant number, since it is smaller than the sum of its proper divisors (757337164604).

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

400002023100 is a wasteful number, since it uses less digits than its factorization.

400002023100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333340094 (or 1333340087 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 400002023100 its reverse (1320200004), we get a palindrome (401322223104).

The spelling of 400002023100 in words is "four hundred billion, two million, twenty-three thousand, one hundred".