400694154 has 64 divisors (see below), whose sum is σ = 971688960. Its totient is φ = 107602560.

The previous prime is 400694143. The next prime is 400694171. The reversal of 400694154 is 451496004.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102622 + ... + 106454.

It is an arithmetic number, because the mean of its divisors is an integer number (15182640).

Almost surely, 2^400694154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400694154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485844480).

400694154 is an abundant number, since it is smaller than the sum of its proper divisors (570994806).

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

400694154 is a wasteful number, since it uses less digits than its factorization.

400694154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3995.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 400694154 is about 20017.3463276229. The cubic root of 400694154 is about 737.2322676171.

The spelling of 400694154 in words is "four hundred million, six hundred ninety-four thousand, one hundred fifty-four".