399292152 has 128 divisors (see below), whose sum is σ = 1205698560. Its totient is φ = 107775360.

The previous prime is 399292151. The next prime is 399292171. The reversal of 399292152 is 251292993.

It is a super-2 number, since 2×399292152² = 318868445297582208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399292151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223053 + ... + 224835.

It is an arithmetic number, because the mean of its divisors is an integer number (9419520).

Almost surely, 2^399292152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399292152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602849280).

399292152 is an abundant number, since it is smaller than the sum of its proper divisors (806406408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399292152 is a wasteful number, since it uses less digits than its factorization.

399292152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1869 counting only the distinct ones).

The product of its digits is 87480, while the sum is 42.

The square root of 399292152 is about 19982.2959641779. The cubic root of 399292152 is about 736.3714207155.

The spelling of 399292152 in words is "three hundred ninety-nine million, two hundred ninety-two thousand, one hundred fifty-two".