77021382 has 16 divisors (see below), whose sum is σ = 155483712. Its totient is φ = 25433640.

The previous prime is 77021381. The next prime is 77021393. The reversal of 77021382 is 28312077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77021381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59344 + ... + 60627.

It is an arithmetic number, because the mean of its divisors is an integer number (9717732).

Almost surely, 2^77021382 is an apocalyptic number.

77021382 is an abundant number, since it is smaller than the sum of its proper divisors (78462330).

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

77021382 is a wasteful number, since it uses less digits than its factorization.

77021382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120083.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 77021382 is about 8776.1826553462. The cubic root of 77021382 is about 425.4714620396.

The spelling of 77021382 in words is "seventy-seven million, twenty-one thousand, three hundred eighty-two".