399041145 has 48 divisors (see below), whose sum is σ = 745085952. Its totient is φ = 196986240.

The previous prime is 399041129. The next prime is 399041147. The reversal of 399041145 is 541140993.

It is a happy number.

It is not a de Polignac number, because 399041145 - 2⁴ = 399041129 is a prime.

It is a super-2 number, since 2×399041145² = 318467670805822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399041147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25867 + ... + 38303.

It is an arithmetic number, because the mean of its divisors is an integer number (15522624).

Almost surely, 2^399041145 is an apocalyptic number.

It is an amenable number.

399041145 is a deficient number, since it is larger than the sum of its proper divisors (346044807).

399041145 is a wasteful number, since it uses less digits than its factorization.

399041145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12502 (or 12499 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 399041145 is about 19976.0142420854. The cubic root of 399041145 is about 736.2170866650.

The spelling of 399041145 in words is "three hundred ninety-nine million, forty-one thousand, one hundred forty-five".