78438010 has 16 divisors (see below), whose sum is σ = 161358336. Its totient is φ = 26893008.

The previous prime is 78438001. The next prime is 78438013. The reversal of 78438010 is 1083487.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78438013) 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, 560202 + ... + 560341.

It is an arithmetic number, because the mean of its divisors is an integer number (10084896).

Almost surely, 2^78438010 is an apocalyptic number.

78438010 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78438010 is an abundant number, since it is smaller than the sum of its proper divisors (82920326).

78438010 is a wasteful number, since it uses less digits than its factorization.

78438010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120557.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 78438010 is about 8856.5235843417. The cubic root of 78438010 is about 428.0641480990.

The spelling of 78438010 in words is "seventy-eight million, four hundred thirty-eight thousand, ten".