97788890 has 8 divisors (see below), whose sum is σ = 176020020. Its totient is φ = 39115552.

The previous prime is 97788871. The next prime is 97788931. The reversal of 97788890 is 9888779.

It can be written as a sum of positive squares in 2 ways, for example, as 97081609 + 707281 = 9853^2 + 841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×97788890⁴ (a number of 33 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4889435 + ... + 4889454.

Almost surely, 2^97788890 is an apocalyptic number.

97788890 is a deficient number, since it is larger than the sum of its proper divisors (78231130).

97788890 is a wasteful number, since it uses less digits than its factorization.

97788890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9778896.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The square root of 97788890 is about 9888.8265228995. The cubic root of 97788890 is about 460.7123336484.

The spelling of 97788890 in words is "ninety-seven million, seven hundred eighty-eight thousand, eight hundred ninety".