97777740 has 48 divisors (see below), whose sum is σ = 274417920. Its totient is φ = 26013120.

The previous prime is 97777711. The next prime is 97777741. The reversal of 97777740 is 4777779.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 97777740.

It is not an unprimeable number, because it can be changed into a prime (97777741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27801 + ... + 31119.

It is an arithmetic number, because the mean of its divisors is an integer number (5717040).

Almost surely, 2^97777740 is an apocalyptic number.

It is an amenable number.

97777740 is an abundant number, since it is smaller than the sum of its proper divisors (176640180).

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

97777740 is a wasteful number, since it uses less digits than its factorization.

97777740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822 (or 3820 counting only the distinct ones).

The product of its (nonzero) digits is 605052, while the sum is 48.

The square root of 97777740 is about 9888.2627392278. The cubic root of 97777740 is about 460.6948226688.

The spelling of 97777740 in words is "ninety-seven million, seven hundred seventy-seven thousand, seven hundred forty".