78325590 has 32 divisors (see below), whose sum is σ = 214836480. Its totient is φ = 17902944.

The previous prime is 78325589. The next prime is 78325591. The reversal of 78325590 is 9552387.

It is an interprime number because it is at equal distance from previous prime (78325589) and next prime (78325591).

It is a super-2 number, since 2×78325590² = 12269796097696200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78325591) 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, 186280 + ... + 186699.

It is an arithmetic number, because the mean of its divisors is an integer number (6713640).

Almost surely, 2^78325590 is an apocalyptic number.

78325590 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78325590 is an abundant number, since it is smaller than the sum of its proper divisors (136510890).

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

78325590 is a wasteful number, since it uses less digits than its factorization.

78325590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372996.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 78325590 is about 8850.1745745494. The cubic root of 78325590 is about 427.8595449976.

The spelling of 78325590 in words is "seventy-eight million, three hundred twenty-five thousand, five hundred ninety".