78260990 has 8 divisors (see below), whose sum is σ = 140869800. Its totient is φ = 31304392.

The previous prime is 78260971. The next prime is 78260999. The reversal of 78260990 is 9906287.

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

It is a super-2 number, since 2×78260990² = 12249565111560200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78260999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3913040 + ... + 3913059.

It is an arithmetic number, because the mean of its divisors is an integer number (17608725).

Almost surely, 2^78260990 is an apocalyptic number.

78260990 is a deficient number, since it is larger than the sum of its proper divisors (62608810).

78260990 is a wasteful number, since it uses less digits than its factorization.

78260990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7826106.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 78260990 is about 8846.5241761949. The cubic root of 78260990 is about 427.7418851590.

The spelling of 78260990 in words is "seventy-eight million, two hundred sixty thousand, nine hundred ninety".