78951040 has 64 divisors (see below), whose sum is σ = 215717760. Its totient is φ = 27067392.

The previous prime is 78951001. The next prime is 78951049. The reversal of 78951040 is 4015987.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 78950987 and 78951005.

It is not an unprimeable number, because it can be changed into a prime (78951049) 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, 4332 + ... + 13291.

It is an arithmetic number, because the mean of its divisors is an integer number (3370590).

Almost surely, 2^78951040 is an apocalyptic number.

78951040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78951040 is an abundant number, since it is smaller than the sum of its proper divisors (136766720).

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

78951040 is a wasteful number, since it uses less digits than its factorization.

78951040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17649 (or 17637 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 78951040 is about 8885.4397752728. The cubic root of 78951040 is about 428.9953832254.

The spelling of 78951040 in words is "seventy-eight million, nine hundred fifty-one thousand, forty".