400101807 has 24 divisors (see below), whose sum is σ = 622315056. Its totient is φ = 227985408.

The previous prime is 400101763. The next prime is 400101809. The reversal of 400101807 is 708101004.

It is not a de Polignac number, because 400101807 - 2⁷ = 400101679 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400101809) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 51183 + ... + 58479.

It is an arithmetic number, because the mean of its divisors is an integer number (25929794).

Almost surely, 2^400101807 is an apocalyptic number.

400101807 is a deficient number, since it is larger than the sum of its proper divisors (222213249).

400101807 is a wasteful number, since it uses less digits than its factorization.

400101807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7687 (or 7680 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 400101807 is about 20002.5450130727. The cubic root of 400101807 is about 736.8688044580.

The spelling of 400101807 in words is "four hundred million, one hundred one thousand, eight hundred seven".