78955420 has 12 divisors (see below), whose sum is σ = 165806424. Its totient is φ = 31582160.

The previous prime is 78955417. The next prime is 78955423. The reversal of 78955420 is 2455987.

It is an interprime number because it is at equal distance from previous prime (78955417) and next prime (78955423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78955423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1973866 + ... + 1973905.

It is an arithmetic number, because the mean of its divisors is an integer number (13817202).

Almost surely, 2^78955420 is an apocalyptic number.

It is an amenable number.

78955420 is an abundant number, since it is smaller than the sum of its proper divisors (86851004).

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

78955420 is a wasteful number, since it uses less digits than its factorization.

78955420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947780 (or 3947778 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 78955420 is about 8885.6862424913. The cubic root of 78955420 is about 429.0033162644.

The spelling of 78955420 in words is "seventy-eight million, nine hundred fifty-five thousand, four hundred twenty".