78490860 has 48 divisors (see below), whose sum is σ = 251172096. Its totient is φ = 17940672.

The previous prime is 78490829. The next prime is 78490861. The reversal of 78490860 is 6809487.

It is a happy number.

It is a super-3 number, since 3×78490860³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (78490861) 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, 93022 + ... + 93861.

It is an arithmetic number, because the mean of its divisors is an integer number (5232752).

Almost surely, 2^78490860 is an apocalyptic number.

78490860 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78490860 is an abundant number, since it is smaller than the sum of its proper divisors (172681236).

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

78490860 is a wasteful number, since it uses less digits than its factorization.

78490860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186902 (or 186900 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 78490860 is about 8859.5067582795. The cubic root of 78490860 is about 428.1602669369.

The spelling of 78490860 in words is "seventy-eight million, four hundred ninety thousand, eight hundred sixty".