1397044278 has 48 divisors (see below), whose sum is σ = 3524635296. Its totient is φ = 391622400.

The previous prime is 1397044273. The next prime is 1397044279. The reversal of 1397044278 is 8724407931.

1397044278 is a `hidden beast` number, since 139 + 7 + 0 + 442 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397044273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97923 + ... + 111278.

It is an arithmetic number, because the mean of its divisors is an integer number (73429902).

Almost surely, 2^1397044278 is an apocalyptic number.

1397044278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1397044278 is an abundant number, since it is smaller than the sum of its proper divisors (2127591018).

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

1397044278 is a wasteful number, since it uses less digits than its factorization.

1397044278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209269 (or 209266 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 1397044278 is about 37377.0555020055. The cubic root of 1397044278 is about 1117.9011175097.

The spelling of 1397044278 in words is "one billion, three hundred ninety-seven million, forty-four thousand, two hundred seventy-eight".