77143146 has 16 divisors (see below), whose sum is σ = 155064000. Its totient is φ = 25584768.

The previous prime is 77143123. The next prime is 77143147. The reversal of 77143146 is 64134177.

It is not an unprimeable number, because it can be changed into a prime (77143147) 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, 31111 + ... + 33498.

It is an arithmetic number, because the mean of its divisors is an integer number (9691500).

Almost surely, 2^77143146 is an apocalyptic number.

77143146 is an abundant number, since it is smaller than the sum of its proper divisors (77920854).

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

77143146 is a wasteful number, since it uses less digits than its factorization.

77143146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64813.

The product of its digits is 14112, while the sum is 33.

The square root of 77143146 is about 8783.1171004376. The cubic root of 77143146 is about 425.6955549209.

The spelling of 77143146 in words is "seventy-seven million, one hundred forty-three thousand, one hundred forty-six".