2149694040 has 64 divisors (see below), whose sum is σ = 6945170400. Its totient is φ = 529155072.

The previous prime is 2149694017. The next prime is 2149694089. The reversal of 2149694040 is 404969412.

It is a super-2 number, since 2×2149694040² = 9242368931223043200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 2149694040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687445 + ... + 690564.

Almost surely, 2^2149694040 is an apocalyptic number.

2149694040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2149694040 is an abundant number, since it is smaller than the sum of its proper divisors (4795476360).

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

2149694040 is a wasteful number, since it uses less digits than its factorization.

2149694040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378036 (or 1378032 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 2149694040 is about 46364.7931085646. The cubic root of 2149694040 is about 1290.6016543254.

The spelling of 2149694040 in words is "two billion, one hundred forty-nine million, six hundred ninety-four thousand, forty".