400767645 has 16 divisors (see below), whose sum is σ = 646126272. Its totient is φ = 212110080.

The previous prime is 400767643. The next prime is 400767691. The reversal of 400767645 is 546767004.

It is not a de Polignac number, because 400767645 - 2¹ = 400767643 is a prime.

It is a super-2 number, since 2×400767645² = 321229410557692050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400767643) 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, 100012 + ... + 103941.

It is an arithmetic number, because the mean of its divisors is an integer number (40382892).

Almost surely, 2^400767645 is an apocalyptic number.

It is an amenable number.

400767645 is a deficient number, since it is larger than the sum of its proper divisors (245358627).

400767645 is a wasteful number, since it uses less digits than its factorization.

400767645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204092.

The product of its (nonzero) digits is 141120, while the sum is 39.

The square root of 400767645 is about 20019.1819263425. The cubic root of 400767645 is about 737.2773365922.

The spelling of 400767645 in words is "four hundred million, seven hundred sixty-seven thousand, six hundred forty-five".