78369274 has 4 divisors (see below), whose sum is σ = 117553914. Its totient is φ = 39184636.

The previous prime is 78369251. The next prime is 78369283. The reversal of 78369274 is 47296387.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63600625 + 14768649 = 7975^2 + 3843^2 .

It is a super-2 number, since 2×78369274² = 12283486214574152, 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 as a sum of consecutive naturals, namely, 19592317 + ... + 19592320.

Almost surely, 2^78369274 is an apocalyptic number.

78369274 is a deficient number, since it is larger than the sum of its proper divisors (39184640).

78369274 is a wasteful number, since it uses less digits than its factorization.

78369274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39184639.

The product of its digits is 508032, while the sum is 46.

The square root of 78369274 is about 8852.6422044495. The cubic root of 78369274 is about 427.9390726152.

The spelling of 78369274 in words is "seventy-eight million, three hundred sixty-nine thousand, two hundred seventy-four".