1397894856 has 32 divisors (see below), whose sum is σ = 3514056000. Its totient is φ = 463389120.

The previous prime is 1397894837. The next prime is 1397894857. The reversal of 1397894856 is 6584987931.

It is a super-2 number, since 2×1397894856² = 3908220056862521472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1397894856.

It is not an unprimeable number, because it can be changed into a prime (1397894857) 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, 156556 + ... + 165243.

It is an arithmetic number, because the mean of its divisors is an integer number (109814250).

Almost surely, 2^1397894856 is an apocalyptic number.

It is an amenable number.

1397894856 is an abundant number, since it is smaller than the sum of its proper divisors (2116161144).

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

1397894856 is a wasteful number, since it uses less digits than its factorization.

1397894856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321989 (or 321985 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The square root of 1397894856 is about 37388.4321147598. The cubic root of 1397894856 is about 1118.1279462037.

The spelling of 1397894856 in words is "one billion, three hundred ninety-seven million, eight hundred ninety-four thousand, eight hundred fifty-six".