97836840 has 48 divisors (see below), whose sum is σ = 317970900. Its totient is φ = 26089728.

The previous prime is 97836811. The next prime is 97836847. The reversal of 97836840 is 4863879.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 91814724 + 6022116 = 9582^2 + 2454^2 .

It is a super-2 number, since 2×97836840² = 19144094522371200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (97836847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135525 + ... + 136244.

Almost surely, 2^97836840 is an apocalyptic number.

97836840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97836840 is an abundant number, since it is smaller than the sum of its proper divisors (220134060).

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

97836840 is a wasteful number, since it uses less digits than its factorization.

97836840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271786 (or 271779 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 97836840 is about 9891.2506792620. The cubic root of 97836840 is about 460.7876235464.

The spelling of 97836840 in words is "ninety-seven million, eight hundred thirty-six thousand, eight hundred forty".