78207461 has 8 divisors (see below), whose sum is σ = 81003000. Its totient is φ = 75418560.

The previous prime is 78207443. The next prime is 78207469. The reversal of 78207461 is 16470287.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 220900 + 77986561 = 470^2 + 8831^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-78207461 is a prime.

It is a super-2 number, since 2×78207461² = 12232813912133042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78207469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44051 + ... + 45791.

It is an arithmetic number, because the mean of its divisors is an integer number (10125375).

Almost surely, 2^78207461 is an apocalyptic number.

It is an amenable number.

78207461 is a deficient number, since it is larger than the sum of its proper divisors (2795539).

78207461 is a wasteful number, since it uses less digits than its factorization.

78207461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 78207461 is about 8843.4982331654. The cubic root of 78207461 is about 427.6443405303.

The spelling of 78207461 in words is "seventy-eight million, two hundred seven thousand, four hundred sixty-one".