83903640 has 32 divisors (see below), whose sum is σ = 251711280. Its totient is φ = 22374272.

The previous prime is 83903623. The next prime is 83903647. The reversal of 83903640 is 4630938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83903647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349479 + ... + 349718.

Almost surely, 2^83903640 is an apocalyptic number.

It is an amenable number.

83903640 is an abundant number, since it is smaller than the sum of its proper divisors (167807640).

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

83903640 is a wasteful number, since it uses less digits than its factorization.

83903640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699211 (or 699207 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 83903640 is about 9159.8930124756. The cubic root of 83903640 is about 437.7843854428.

The spelling of 83903640 in words is "eighty-three million, nine hundred three thousand, six hundred forty".