78461396 has 12 divisors (see below), whose sum is σ = 147869652. Its totient is φ = 36212928.

The previous prime is 78461389. The next prime is 78461399. The reversal of 78461396 is 69316487.

It can be written as a sum of positive squares in 2 ways, for example, as 26419600 + 52041796 = 5140^2 + 7214^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78461399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754385 + ... + 754488.

It is an arithmetic number, because the mean of its divisors is an integer number (12322471).

Almost surely, 2^78461396 is an apocalyptic number.

It is an amenable number.

78461396 is a deficient number, since it is larger than the sum of its proper divisors (69408256).

78461396 is a wasteful number, since it uses less digits than its factorization.

78461396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508890 (or 1508888 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 78461396 is about 8857.8437556778. The cubic root of 78461396 is about 428.1066857813.

The spelling of 78461396 in words is "seventy-eight million, four hundred sixty-one thousand, three hundred ninety-six".