78237049 has 16 divisors (see below), whose sum is σ = 86860800. Its totient is φ = 69878160.

The previous prime is 78237031. The next prime is 78237091. The reversal of 78237049 is 94073287.

It is not a de Polignac number, because 78237049 - 2⁵ = 78237017 is a prime.

It is a super-2 number, since 2×78237049² = 12242071672456802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78237449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225294 + ... + 225640.

It is an arithmetic number, because the mean of its divisors is an integer number (5428800).

Almost surely, 2^78237049 is an apocalyptic number.

It is an amenable number.

78237049 is a deficient number, since it is larger than the sum of its proper divisors (8623751).

78237049 is a wasteful number, since it uses less digits than its factorization.

78237049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 78237049 is about 8845.1709423843. The cubic root of 78237049 is about 427.6982635416.

The spelling of 78237049 in words is "seventy-eight million, two hundred thirty-seven thousand, forty-nine".