78389010 has 48 divisors (see below), whose sum is σ = 232929216. Its totient is φ = 17917344.

The previous prime is 78389009. The next prime is 78389027. The reversal of 78389010 is 1098387.

It is a super-2 number, since 2×78389010² = 12289673777560200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61584 + ... + 62843.

It is an arithmetic number, because the mean of its divisors is an integer number (4852692).

Almost surely, 2^78389010 is an apocalyptic number.

78389010 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78389010 is an abundant number, since it is smaller than the sum of its proper divisors (154540206).

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

78389010 is a wasteful number, since it uses less digits than its factorization.

78389010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124447 (or 124444 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 78389010 is about 8853.7568297305. The cubic root of 78389010 is about 427.9749927160.

The spelling of 78389010 in words is "seventy-eight million, three hundred eighty-nine thousand, ten".