400515145 has 8 divisors (see below), whose sum is σ = 480731400. Its totient is φ = 320336640.

The previous prime is 400515139. The next prime is 400515163. The reversal of 400515145 is 541515004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 257377849 + 143137296 = 16043^2 + 11964^2 .

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

It is not a de Polignac number, because 400515145 - 2¹⁵ = 400482377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26035 + ... + 38455.

It is an arithmetic number, because the mean of its divisors is an integer number (60091425).

Almost surely, 2^400515145 is an apocalyptic number.

It is an amenable number.

400515145 is a deficient number, since it is larger than the sum of its proper divisors (80216255).

400515145 is a wasteful number, since it uses less digits than its factorization.

400515145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18875.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 400515145 is about 20012.8744811934. The cubic root of 400515145 is about 737.1224657752.

The spelling of 400515145 in words is "four hundred million, five hundred fifteen thousand, one hundred forty-five".