78124412 has 12 divisors (see below), whose sum is σ = 138758760. Its totient is φ = 38479056.

The previous prime is 78124411. The next prime is 78124429. The reversal of 78124412 is 21442187.

It is a super-2 number, since 2×78124412² = 12206847500691488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78124411) 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, 145487 + ... + 146022.

It is an arithmetic number, because the mean of its divisors is an integer number (11563230).

Almost surely, 2^78124412 is an apocalyptic number.

It is an amenable number.

78124412 is a deficient number, since it is larger than the sum of its proper divisors (60634348).

78124412 is a wasteful number, since it uses less digits than its factorization.

78124412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291580 (or 291578 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 78124412 is about 8838.8015024663. The cubic root of 78124412 is about 427.4929141696.

Adding to 78124412 its reverse (21442187), we get a palindrome (99566599).

The spelling of 78124412 in words is "seventy-eight million, one hundred twenty-four thousand, four hundred twelve".