400738107 has 16 divisors (see below), whose sum is σ = 666162432. Its totient is φ = 208175520.

The previous prime is 400738087. The next prime is 400738109. The reversal of 400738107 is 701837004.

It is a happy number.

It is not a de Polignac number, because 400738107 - 2⁸ = 400737851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400738109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867168 + ... + 867629.

It is an arithmetic number, because the mean of its divisors is an integer number (41635152).

Almost surely, 2^400738107 is an apocalyptic number.

400738107 is a deficient number, since it is larger than the sum of its proper divisors (265424325).

400738107 is a wasteful number, since it uses less digits than its factorization.

400738107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734818.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 400738107 is about 20018.4441703145. Note that the first 3 decimals coincide. The cubic root of 400738107 is about 737.2592228270.

The spelling of 400738107 in words is "four hundred million, seven hundred thirty-eight thousand, one hundred seven".