398049785 has 40 divisors (see below), whose sum is σ = 566294976. Its totient is φ = 268527840.

The previous prime is 398049779. The next prime is 398049809. The reversal of 398049785 is 587940893.

It is not a de Polignac number, because 398049785 - 2²² = 393855481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 852122 + ... + 852588.

Almost surely, 2^398049785 is an apocalyptic number.

398049785 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

398049785 is a deficient number, since it is larger than the sum of its proper divisors (168245191).

398049785 is an frugal number, since it uses more digits than its factorization.

398049785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 398049785 is about 19951.1850525226. The cubic root of 398049785 is about 735.6069061333.

The spelling of 398049785 in words is "three hundred ninety-eight million, forty-nine thousand, seven hundred eighty-five".