400071552 has 32 divisors (see below), whose sum is σ = 1062691080. Its totient is φ = 133357056.

The previous prime is 400071547. The next prime is 400071569. The reversal of 400071552 is 255170004.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520543 + ... + 521310.

Almost surely, 2^400071552 is an apocalyptic number.

It is an amenable number.

400071552 is an abundant number, since it is smaller than the sum of its proper divisors (662619528).

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

400071552 is a wasteful number, since it uses less digits than its factorization.

400071552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041870 (or 1041858 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 400071552 is about 20001.7887200120. The cubic root of 400071552 is about 736.8502304124.

The spelling of 400071552 in words is "four hundred million, seventy-one thousand, five hundred fifty-two".