78940758 has 64 divisors (see below), whose sum is σ = 185008320. Its totient is φ = 22228992.

The previous prime is 78940751. The next prime is 78940781. The reversal of 78940758 is 85704987.

It is a super-2 number, since 2×78940758² = 12463286547229128, 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 (78940751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48258 + ... + 49866.

It is an arithmetic number, because the mean of its divisors is an integer number (2890755).

Almost surely, 2^78940758 is an apocalyptic number.

78940758 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78940758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92504160).

78940758 is an abundant number, since it is smaller than the sum of its proper divisors (106067562).

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

78940758 is a wasteful number, since it uses less digits than its factorization.

78940758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 78940758 is about 8884.8611694275. The cubic root of 78940758 is about 428.9767593541.

The spelling of 78940758 in words is "seventy-eight million, nine hundred forty thousand, seven hundred fifty-eight".