400151444 has 36 divisors (see below), whose sum is σ = 888652800. Its totient is φ = 155902320.

The previous prime is 400151429. The next prime is 400151459. The reversal of 400151444 is 444151004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (400151429) and next prime (400151459).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90644 + ... + 94955.

It is an arithmetic number, because the mean of its divisors is an integer number (24684800).

Almost surely, 2^400151444 is an apocalyptic number.

400151444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400151444 is an abundant number, since it is smaller than the sum of its proper divisors (488501356).

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

400151444 is a wasteful number, since it uses less digits than its factorization.

400151444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185628 (or 185619 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 400151444 is about 20003.7857417040. The cubic root of 400151444 is about 736.8992754063.

The spelling of 400151444 in words is "four hundred million, one hundred fifty-one thousand, four hundred forty-four".