77142246 has 16 divisors (see below), whose sum is σ = 154513008. Its totient is φ = 25676000.

The previous prime is 77142211. The next prime is 77142251. The reversal of 77142246 is 64224177.

It is a super-2 number, since 2×77142246² = 11901852235849032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4965 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (9657063).

Almost surely, 2^77142246 is an apocalyptic number.

77142246 is an abundant number, since it is smaller than the sum of its proper divisors (77370762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77142246 is a wasteful number, since it uses less digits than its factorization.

77142246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19047.

The product of its digits is 18816, while the sum is 33.

The square root of 77142246 is about 8783.0658656303. The cubic root of 77142246 is about 425.6938994380.

The spelling of 77142246 in words is "seventy-seven million, one hundred forty-two thousand, two hundred forty-six".