78372442 has 8 divisors (see below), whose sum is σ = 121612500. Its totient is φ = 37834944.

The previous prime is 78372439. The next prime is 78372451. The reversal of 78372442 is 24427387.

It can be written as a sum of positive squares in 2 ways, for example, as 77951241 + 421201 = 8829^2 + 649^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78372442² = 12284479330086728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675567 + ... + 675682.

Almost surely, 2^78372442 is an apocalyptic number.

78372442 is a deficient number, since it is larger than the sum of its proper divisors (43240058).

78372442 is a wasteful number, since it uses less digits than its factorization.

78372442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351280.

The product of its digits is 75264, while the sum is 37.

The square root of 78372442 is about 8852.8211322719. The cubic root of 78372442 is about 427.9448388747.

The spelling of 78372442 in words is "seventy-eight million, three hundred seventy-two thousand, four hundred forty-two".