400699800 has 288 divisors, whose sum is σ = 1429908480. Its totient is φ = 100396800.

The previous prime is 400699781. The next prime is 400699807. The reversal of 400699800 is 8996004.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400699807) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2399317 + ... + 2399483.

It is an arithmetic number, because the mean of its divisors is an integer number (4964960).

Almost surely, 2^400699800 is an apocalyptic number.

400699800 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400699800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (714954240).

400699800 is an abundant number, since it is smaller than the sum of its proper divisors (1029208680).

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

400699800 is a wasteful number, since it uses less digits than its factorization.

400699800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 400699800 is about 20017.4873548105. The cubic root of 400699800 is about 737.2357302696.

The spelling of 400699800 in words is "four hundred million, six hundred ninety-nine thousand, eight hundred".