78022990 has 8 divisors (see below), whose sum is σ = 140441400. Its totient is φ = 31209192.

The previous prime is 78022981. The next prime is 78022991. The reversal of 78022990 is 9922087.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78022991) 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, 3901140 + ... + 3901159.

It is an arithmetic number, because the mean of its divisors is an integer number (17555175).

Almost surely, 2^78022990 is an apocalyptic number.

78022990 is a deficient number, since it is larger than the sum of its proper divisors (62418410).

78022990 is a wasteful number, since it uses less digits than its factorization.

78022990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7802306.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 78022990 is about 8833.0623228867. The cubic root of 78022990 is about 427.3078420048.

The spelling of 78022990 in words is "seventy-eight million, twenty-two thousand, nine hundred ninety".