78641950 has 24 divisors (see below), whose sum is σ = 153974520. Its totient is φ = 29800800.

The previous prime is 78641921. The next prime is 78641957. The reversal of 78641950 is 5914687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78641957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40441 + ... + 42340.

It is an arithmetic number, because the mean of its divisors is an integer number (6415605).

Almost surely, 2^78641950 is an apocalyptic number.

78641950 is a deficient number, since it is larger than the sum of its proper divisors (75332570).

78641950 is a wasteful number, since it uses less digits than its factorization.

78641950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82812 (or 82807 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 78641950 is about 8868.0296571448. The cubic root of 78641950 is about 428.4348180992.

The spelling of 78641950 in words is "seventy-eight million, six hundred forty-one thousand, nine hundred fifty".