398710457 has 8 divisors (see below), whose sum is σ = 405991872. Its totient is φ = 391453200.

The previous prime is 398710439. The next prime is 398710471. The reversal of 398710457 is 754017893.

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 398710457 - 2⁸ = 398710201 is a prime.

It is a super-2 number, since 2×398710457² = 317940057042297698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398710427) 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, 29108 + ... + 40554.

It is an arithmetic number, because the mean of its divisors is an integer number (50748984).

Almost surely, 2^398710457 is an apocalyptic number.

It is an amenable number.

398710457 is a deficient number, since it is larger than the sum of its proper divisors (7281415).

398710457 is a wasteful number, since it uses less digits than its factorization.

398710457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12079.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 398710457 is about 19967.7353998895. The cubic root of 398710457 is about 736.0136611605.

The spelling of 398710457 in words is "three hundred ninety-eight million, seven hundred ten thousand, four hundred fifty-seven".