83573840 has 40 divisors (see below), whose sum is σ = 222069120. Its totient is φ = 28653696.

The previous prime is 83573839. The next prime is 83573851. The reversal of 83573840 is 4837538.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 83573794 and 83573803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74060 + ... + 75179.

It is an arithmetic number, because the mean of its divisors is an integer number (5551728).

Almost surely, 2^83573840 is an apocalyptic number.

83573840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83573840 is an abundant number, since it is smaller than the sum of its proper divisors (138495280).

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

83573840 is a wasteful number, since it uses less digits than its factorization.

83573840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149259 (or 149253 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 83573840 is about 9141.8728934502. The cubic root of 83573840 is about 437.2100326190.

The spelling of 83573840 in words is "eighty-three million, five hundred seventy-three thousand, eight hundred forty".