78354814 has 16 divisors (see below), whose sum is σ = 118711152. Its totient is φ = 38786688.

The previous prime is 78354811. The next prime is 78354817. The reversal of 78354814 is 41845387.

It is an interprime number because it is at equal distance from previous prime (78354811) and next prime (78354817).

It is a super-2 number, since 2×78354814² = 12278953753949192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78354811) 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, 149557 + ... + 150079.

It is an arithmetic number, because the mean of its divisors is an integer number (7419447).

Almost surely, 2^78354814 is an apocalyptic number.

78354814 is a deficient number, since it is larger than the sum of its proper divisors (40356338).

78354814 is a wasteful number, since it uses less digits than its factorization.

78354814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131.

The product of its digits is 107520, while the sum is 40.

The square root of 78354814 is about 8851.8254614514. The cubic root of 78354814 is about 427.9127511617.

The spelling of 78354814 in words is "seventy-eight million, three hundred fifty-four thousand, eight hundred fourteen".