1397369390 has 16 divisors (see below), whose sum is σ = 2541197232. Its totient is φ = 553185024.

The previous prime is 1397369387. The next prime is 1397369399. The reversal of 1397369390 is 939637931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397369399) 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, 719324 + ... + 721263.

It is an arithmetic number, because the mean of its divisors is an integer number (158824827).

Almost surely, 2^1397369390 is an apocalyptic number.

1397369390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1397369390 is a deficient number, since it is larger than the sum of its proper divisors (1143827842).

1397369390 is a wasteful number, since it uses less digits than its factorization.

1397369390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440691.

The product of its (nonzero) digits is 826686, while the sum is 50.

The square root of 1397369390 is about 37381.4043342408. The cubic root of 1397369390 is about 1117.9878279274.

The spelling of 1397369390 in words is "one billion, three hundred ninety-seven million, three hundred sixty-nine thousand, three hundred ninety".