399426051 has 8 divisors (see below), whose sum is σ = 533506320. Its totient is φ = 265814912.

The previous prime is 399426017. The next prime is 399426107. The reversal of 399426051 is 150624993.

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

It is a cyclic number.

It is not a de Polignac number, because 399426051 - 2¹⁷ = 399294979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399426751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115290 + ... + 118703.

It is an arithmetic number, because the mean of its divisors is an integer number (66688290).

Almost surely, 2^399426051 is an apocalyptic number.

399426051 is a deficient number, since it is larger than the sum of its proper divisors (134080269).

399426051 is a wasteful number, since it uses less digits than its factorization.

399426051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234565.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 399426051 is about 19985.6461241562. The cubic root of 399426051 is about 736.4537233411.

The spelling of 399426051 in words is "three hundred ninety-nine million, four hundred twenty-six thousand, fifty-one".