78250274 has 4 divisors (see below), whose sum is σ = 117375414. Its totient is φ = 39125136.

The previous prime is 78250261. The next prime is 78250279. The reversal of 78250274 is 47205287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47205287 = 911 ⋅51817.

It can be written as a sum of positive squares in only one way, i.e., 64240225 + 14010049 = 8015^2 + 3743^2 .

It is a super-2 number, since 2×78250274² = 12246210762150152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78250279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19562567 + ... + 19562570.

Almost surely, 2^78250274 is an apocalyptic number.

78250274 is a deficient number, since it is larger than the sum of its proper divisors (39125140).

78250274 is a wasteful number, since it uses less digits than its factorization.

78250274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39125139.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 78250274 is about 8845.9184938592. The cubic root of 78250274 is about 427.7223612078.

The spelling of 78250274 in words is "seventy-eight million, two hundred fifty thousand, two hundred seventy-four".