87770641 has 16 divisors (see below), whose sum is σ = 103871488. Its totient is φ = 72576000.

The previous prime is 87770621. The next prime is 87770651. The reversal of 87770641 is 14607778.

It is not a de Polignac number, because 87770641 - 2¹⁵ = 87737873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87770594 and 87770603.

It is not an unprimeable number, because it can be changed into a prime (87770621) 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, 130081 + ... + 130753.

It is an arithmetic number, because the mean of its divisors is an integer number (6491968).

Almost surely, 2^87770641 is an apocalyptic number.

It is an amenable number.

87770641 is a deficient number, since it is larger than the sum of its proper divisors (16100847).

87770641 is a wasteful number, since it uses less digits than its factorization.

87770641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 87770641 is about 9368.5986678905. The cubic root of 87770641 is about 444.4092501969.

The spelling of 87770641 in words is "eighty-seven million, seven hundred seventy thousand, six hundred forty-one".