78351790 has 16 divisors (see below), whose sum is σ = 153854640. Its totient is φ = 28491520.

The previous prime is 78351781. The next prime is 78351797. The reversal of 78351790 is 9715387.

It is a super-2 number, since 2×78351790² = 12278005992408200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78351797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356035 + ... + 356254.

It is an arithmetic number, because the mean of its divisors is an integer number (9615915).

Almost surely, 2^78351790 is an apocalyptic number.

78351790 is a deficient number, since it is larger than the sum of its proper divisors (75502850).

78351790 is a wasteful number, since it uses less digits than its factorization.

78351790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712307.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 78351790 is about 8851.6546475786. The cubic root of 78351790 is about 427.9072461827.

The spelling of 78351790 in words is "seventy-eight million, three hundred fifty-one thousand, seven hundred ninety".