1396657522 has 8 divisors (see below), whose sum is σ = 2256139116. Its totient is φ = 644611152.

The previous prime is 1396657519. The next prime is 1396657583. The reversal of 1396657522 is 2257566931.

It can be written as a sum of positive squares in 2 ways, for example, as 1133601561 + 263055961 = 33669^2 + 16219^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26858773 + ... + 26858824.

Almost surely, 2^1396657522 is an apocalyptic number.

1396657522 is a deficient number, since it is larger than the sum of its proper divisors (859481594).

1396657522 is a wasteful number, since it uses less digits than its factorization.

1396657522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53717612.

The product of its digits is 680400, while the sum is 46.

The square root of 1396657522 is about 37371.8814351111. The cubic root of 1396657522 is about 1117.7979485371.

The spelling of 1396657522 in words is "one billion, three hundred ninety-six million, six hundred fifty-seven thousand, five hundred twenty-two".