390396739 has 8 divisors (see below), whose sum is σ = 396554240. Its totient is φ = 384249096.

The previous prime is 390396691. The next prime is 390396751. The reversal of 390396739 is 937693093.

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 390396739 - 2¹⁹ = 389872451 is a prime.

It is a super-2 number, since 2×390396739² = 304819227643668242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 390396692 and 390396701.

It is not an unprimeable number, because it can be changed into a prime (390396239) 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, 142222 + ... + 144940.

It is an arithmetic number, because the mean of its divisors is an integer number (49569280).

Almost surely, 2^390396739 is an apocalyptic number.

390396739 is a deficient number, since it is larger than the sum of its proper divisors (6157501).

390396739 is a wasteful number, since it uses less digits than its factorization.

390396739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4929.

The product of its (nonzero) digits is 826686, while the sum is 49.

The square root of 390396739 is about 19758.4599349241. The cubic root of 390396739 is about 730.8620197776.

The spelling of 390396739 in words is "three hundred ninety million, three hundred ninety-six thousand, seven hundred thirty-nine".