1399269650 has 12 divisors (see below), whose sum is σ = 2602641642. Its totient is φ = 559707840.

The previous prime is 1399269637. The next prime is 1399269673. The reversal of 1399269650 is 569629931.

It can be written as a sum of positive squares in 3 ways, for example, as 900060001 + 499209649 = 30001^2 + 22343^2 .

It is a super-2 number, since 2×1399269650² = 3915911106822245000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 27985393 = 1399269650 / (1 + 3 + 9 + 9 + 2 + 6 + 9 + 6 + 5 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13992647 + ... + 13992746.

Almost surely, 2^1399269650 is an apocalyptic number.

1399269650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1399269650 is a deficient number, since it is larger than the sum of its proper divisors (1203371992).

1399269650 is a wasteful number, since it uses less digits than its factorization.

1399269650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27985405 (or 27985400 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 50.

The square root of 1399269650 is about 37406.8128821476. The cubic root of 1399269650 is about 1118.4943762275.

The spelling of 1399269650 in words is "one billion, three hundred ninety-nine million, two hundred sixty-nine thousand, six hundred fifty".