78148402 has 12 divisors (see below), whose sum is σ = 117945450. Its totient is φ = 38834688.

The previous prime is 78148393. The next prime is 78148453. The reversal of 78148402 is 20484187.

It can be written as a sum of positive squares in 3 ways, for example, as 64818601 + 13329801 = 8051^2 + 3651^2 .

It is a super-2 number, since 2×78148402² = 12214345470307208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73974 + ... + 75022.

Almost surely, 2^78148402 is an apocalyptic number.

78148402 is a deficient number, since it is larger than the sum of its proper divisors (39797048).

78148402 is a wasteful number, since it uses less digits than its factorization.

78148402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 78148402 is about 8840.1584827423. The cubic root of 78148402 is about 427.5366670555.

The spelling of 78148402 in words is "seventy-eight million, one hundred forty-eight thousand, four hundred two".