400240098 has 12 divisors (see below), whose sum is σ = 867186918. Its totient is φ = 133413360.

The previous prime is 400240097. The next prime is 400240103. The reversal of 400240098 is 890042004.

It can be written as a sum of positive squares in only one way, i.e., 323028729 + 77211369 = 17973^2 + 8787^2 .

It is not an unprimeable number, because it can be changed into a prime (400240097) 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, 11117763 + ... + 11117798.

Almost surely, 2^400240098 is an apocalyptic number.

400240098 is an abundant number, since it is smaller than the sum of its proper divisors (466946820).

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

400240098 is a wasteful number, since it uses less digits than its factorization.

400240098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22235569 (or 22235566 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 400240098 is about 20006.0015495351. The cubic root of 400240098 is about 736.9536916740.

It can be divided in two parts, 4002 and 40098, that added together give a square (44100 = 210²).

The spelling of 400240098 in words is "four hundred million, two hundred forty thousand, ninety-eight".