97778442 has 16 divisors (see below), whose sum is σ = 195667200. Its totient is φ = 32574432.

The previous prime is 97778437. The next prime is 97778449. The reversal of 97778442 is 24487779.

It is a junction number, because it is equal to n+sod(n) for n = 97778391 and 97778400.

It is not an unprimeable number, because it can be changed into a prime (97778449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10998 + ... + 17790.

It is an arithmetic number, because the mean of its divisors is an integer number (12229200).

Almost surely, 2^97778442 is an apocalyptic number.

97778442 is an abundant number, since it is smaller than the sum of its proper divisors (97888758).

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

97778442 is a wasteful number, since it uses less digits than its factorization.

97778442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9197.

The product of its digits is 790272, while the sum is 48.

The square root of 97778442 is about 9888.2982357937. The cubic root of 97778442 is about 460.6959251931.

The spelling of 97778442 in words is "ninety-seven million, seven hundred seventy-eight thousand, four hundred forty-two".