78373420 has 48 divisors (see below), whose sum is σ = 172585728. Its totient is φ = 29839040.

The previous prime is 78373411. The next prime is 78373469. The reversal of 78373420 is 2437387.

It is a super-2 number, since 2×78373420² = 12284785924992800, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 159375 + ... + 159865.

It is an arithmetic number, because the mean of its divisors is an integer number (3595536).

Almost surely, 2^78373420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78373420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86292864).

78373420 is an abundant number, since it is smaller than the sum of its proper divisors (94212308).

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

78373420 is a wasteful number, since it uses less digits than its factorization.

78373420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 78373420 is about 8852.8763687290. The cubic root of 78373420 is about 427.9466189575.

The spelling of 78373420 in words is "seventy-eight million, three hundred seventy-three thousand, four hundred twenty".