400455145 has 16 divisors (see below), whose sum is σ = 511878528. Its totient is φ = 299703040.

The previous prime is 400455131. The next prime is 400455157. The reversal of 400455145 is 541554004.

It is not a de Polignac number, because 400455145 - 2¹⁹ = 399930857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90 + ... + 28300.

It is an arithmetic number, because the mean of its divisors is an integer number (31992408).

Almost surely, 2^400455145 is an apocalyptic number.

It is an amenable number.

400455145 is a deficient number, since it is larger than the sum of its proper divisors (111423383).

400455145 is a wasteful number, since it uses less digits than its factorization.

400455145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28400.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 400455145 is about 20011.3753900126. The cubic root of 400455145 is about 737.0856552182.

The spelling of 400455145 in words is "four hundred million, four hundred fifty-five thousand, one hundred forty-five".