398390070 has 64 divisors (see below), whose sum is σ = 1090272960. Its totient is φ = 92295168.

The previous prime is 398390059. The next prime is 398390099. The reversal of 398390070 is 70093893.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23415 + ... + 36674.

It is an arithmetic number, because the mean of its divisors is an integer number (17035515).

Almost surely, 2^398390070 is an apocalyptic number.

398390070 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398390070 is an abundant number, since it is smaller than the sum of its proper divisors (691882890).

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

398390070 is a wasteful number, since it uses less digits than its factorization.

398390070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60129.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 398390070 is about 19959.7111702549. The cubic root of 398390070 is about 735.8164650958.

The spelling of 398390070 in words is "three hundred ninety-eight million, three hundred ninety thousand, seventy".