78401614 has 4 divisors (see below), whose sum is σ = 117602424. Its totient is φ = 39200806.

The previous prime is 78401611. The next prime is 78401627. The reversal of 78401614 is 41610487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41610487 = 5483 ⋅7589.

It is a super-2 number, since 2×78401614² = 12293626155609992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78401611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19600402 + ... + 19600405.

It is an arithmetic number, because the mean of its divisors is an integer number (29400606).

Almost surely, 2^78401614 is an apocalyptic number.

78401614 is a deficient number, since it is larger than the sum of its proper divisors (39200810).

78401614 is a wasteful number, since it uses less digits than its factorization.

78401614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39200809.

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

The square root of 78401614 is about 8854.4685893621. The cubic root of 78401614 is about 427.9979292123.

The spelling of 78401614 in words is "seventy-eight million, four hundred one thousand, six hundred fourteen".