400581148 has 36 divisors (see below), whose sum is σ = 781459056. Its totient is φ = 179502400.

The previous prime is 400581131. The next prime is 400581173. The reversal of 400581148 is 841185004.

It is a super-2 number, since 2×400581148² = 320930512265995808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28536 + ... + 40192.

It is an arithmetic number, because the mean of its divisors is an integer number (21707196).

Almost surely, 2^400581148 is an apocalyptic number.

It is an amenable number.

400581148 is a deficient number, since it is larger than the sum of its proper divisors (380877908).

400581148 is a wasteful number, since it uses less digits than its factorization.

400581148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11754 (or 11741 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 400581148 is about 20014.5234267519. The cubic root of 400581148 is about 737.1629549821.

The spelling of 400581148 in words is "four hundred million, five hundred eighty-one thousand, one hundred forty-eight".