78894501 has 32 divisors (see below), whose sum is σ = 127991808. Its totient is φ = 42197760.

The previous prime is 78894493. The next prime is 78894503. The reversal of 78894501 is 10549887.

It is not a de Polignac number, because 78894501 - 2³ = 78894493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78894503) 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, 79116 + ... + 80106.

It is an arithmetic number, because the mean of its divisors is an integer number (3999744).

Almost surely, 2^78894501 is an apocalyptic number.

It is an amenable number.

78894501 is a deficient number, since it is larger than the sum of its proper divisors (49097307).

78894501 is a wasteful number, since it uses less digits than its factorization.

78894501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 78894501 is about 8882.2576521963. The cubic root of 78894501 is about 428.8929536600.

The spelling of 78894501 in words is "seventy-eight million, eight hundred ninety-four thousand, five hundred one".