77490620 has 12 divisors (see below), whose sum is σ = 162730344. Its totient is φ = 30996240.

The previous prime is 77490619. The next prime is 77490631. The reversal of 77490620 is 2609477.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1937246 + ... + 1937285.

It is an arithmetic number, because the mean of its divisors is an integer number (13560862).

Almost surely, 2^77490620 is an apocalyptic number.

It is an amenable number.

77490620 is an abundant number, since it is smaller than the sum of its proper divisors (85239724).

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

77490620 is a wasteful number, since it uses less digits than its factorization.

77490620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3874540 (or 3874538 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 77490620 is about 8802.8756665081. The cubic root of 77490620 is about 426.3337477307. Note that the first 3 decimals are identical.

The spelling of 77490620 in words is "seventy-seven million, four hundred ninety thousand, six hundred twenty".