77331090 has 32 divisors (see below), whose sum is σ = 188142336. Its totient is φ = 20338560.

The previous prime is 77331049. The next prime is 77331091. The reversal of 77331090 is 9013377.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77331091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15466 + ... + 19845.

It is an arithmetic number, because the mean of its divisors is an integer number (5879448).

Almost surely, 2^77331090 is an apocalyptic number.

77331090 is an abundant number, since it is smaller than the sum of its proper divisors (110811246).

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

77331090 is a wasteful number, since it uses less digits than its factorization.

77331090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35394.

The product of its (nonzero) digits is 3969, while the sum is 30.

The square root of 77331090 is about 8793.8097545944. The cubic root of 77331090 is about 426.0409821932.

The spelling of 77331090 in words is "seventy-seven million, three hundred thirty-one thousand, ninety".