77148212 has 24 divisors (see below), whose sum is σ = 139722240. Its totient is φ = 37234080.

The previous prime is 77148199. The next prime is 77148217. The reversal of 77148212 is 21284177.

It is a happy number.

It is a super-2 number, since 2×77148212² = 11903693229593888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77148217) 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, 83489 + ... + 84407.

It is an arithmetic number, because the mean of its divisors is an integer number (5821760).

Almost surely, 2^77148212 is an apocalyptic number.

It is an amenable number.

77148212 is a deficient number, since it is larger than the sum of its proper divisors (62574028).

77148212 is a wasteful number, since it uses less digits than its factorization.

77148212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1629 counting only the distinct ones).

The product of its digits is 6272, while the sum is 32.

The square root of 77148212 is about 8783.4054898997. The cubic root of 77148212 is about 425.7048732103.

The spelling of 77148212 in words is "seventy-seven million, one hundred forty-eight thousand, two hundred twelve".