400155104 has 24 divisors (see below), whose sum is σ = 822059280. Its totient is φ = 191378176.

The previous prime is 400155101. The next prime is 400155109. The reversal of 400155104 is 401551004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400155101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271109 + ... + 272580.

It is an arithmetic number, because the mean of its divisors is an integer number (34252470).

Almost surely, 2^400155104 is an apocalyptic number.

It is an amenable number.

400155104 is an abundant number, since it is smaller than the sum of its proper divisors (421904176).

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

400155104 is a wasteful number, since it uses less digits than its factorization.

400155104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543722 (or 543714 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 400155104 is about 20003.8772241783. The cubic root of 400155104 is about 736.9015220916.

The spelling of 400155104 in words is "four hundred million, one hundred fifty-five thousand, one hundred four".