78327390 has 32 divisors (see below), whose sum is σ = 194052096. Its totient is φ = 20213280.

The previous prime is 78327383. The next prime is 78327407. The reversal of 78327390 is 9372387.

It is a super-2 number, since 2×78327390² = 12270360048424200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41182 + ... + 43041.

It is an arithmetic number, because the mean of its divisors is an integer number (6064128).

Almost surely, 2^78327390 is an apocalyptic number.

78327390 is an abundant number, since it is smaller than the sum of its proper divisors (115724706).

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

78327390 is a wasteful number, since it uses less digits than its factorization.

78327390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84264.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 78327390 is about 8850.2762668744. The cubic root of 78327390 is about 427.8628225185.

The spelling of 78327390 in words is "seventy-eight million, three hundred twenty-seven thousand, three hundred ninety".