78475790 has 8 divisors (see below), whose sum is σ = 141256440. Its totient is φ = 31390312.

The previous prime is 78475777. The next prime is 78475799. The reversal of 78475790 is 9757487.

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

It is a super-2 number, since 2×78475790² = 12316899232248200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78475799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3923780 + ... + 3923799.

It is an arithmetic number, because the mean of its divisors is an integer number (17657055).

Almost surely, 2^78475790 is an apocalyptic number.

78475790 is a deficient number, since it is larger than the sum of its proper divisors (62780650).

78475790 is a wasteful number, since it uses less digits than its factorization.

78475790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7847586.

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 78475790 is about 8858.6562186372. The cubic root of 78475790 is about 428.1328633717.

The spelling of 78475790 in words is "seventy-eight million, four hundred seventy-five thousand, seven hundred ninety".