400633647 has 8 divisors (see below), whose sum is σ = 534339840. Its totient is φ = 267008280.

The previous prime is 400633643. The next prime is 400633657. The reversal of 400633647 is 746336004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400633647 - 2² = 400633643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400633643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7497 + ... + 29282.

It is an arithmetic number, because the mean of its divisors is an integer number (66792480).

Almost surely, 2^400633647 is an apocalyptic number.

400633647 is a deficient number, since it is larger than the sum of its proper divisors (133706193).

400633647 is a wasteful number, since it uses less digits than its factorization.

400633647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40413.

The product of its (nonzero) digits is 36288, while the sum is 33.

The square root of 400633647 is about 20015.8349063935. The cubic root of 400633647 is about 737.1951570529.

The spelling of 400633647 in words is "four hundred million, six hundred thirty-three thousand, six hundred forty-seven".