78269738 has 8 divisors (see below), whose sum is σ = 120268260. Its totient is φ = 38180320.

The previous prime is 78269693. The next prime is 78269743. The reversal of 78269738 is 83796287.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70778569 + 7491169 = 8413^2 + 2737^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78269738² = 12252303773177288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477173 + ... + 477336.

Almost surely, 2^78269738 is an apocalyptic number.

78269738 is a deficient number, since it is larger than the sum of its proper divisors (41998522).

78269738 is a wasteful number, since it uses less digits than its factorization.

78269738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954552.

The product of its digits is 1016064, while the sum is 50.

The square root of 78269738 is about 8847.0185938541. The cubic root of 78269738 is about 427.7578222033.

The spelling of 78269738 in words is "seventy-eight million, two hundred sixty-nine thousand, seven hundred thirty-eight".