87790070 has 32 divisors (see below), whose sum is σ = 166924800. Its totient is φ = 33150816.

The previous prime is 87790069. The next prime is 87790121. The reversal of 87790070 is 7009778.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69101 + ... + 70359.

It is an arithmetic number, because the mean of its divisors is an integer number (5216400).

Almost surely, 2^87790070 is an apocalyptic number.

87790070 is a deficient number, since it is larger than the sum of its proper divisors (79134730).

87790070 is a wasteful number, since it uses less digits than its factorization.

87790070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652.

The product of its (nonzero) digits is 24696, while the sum is 38.

The square root of 87790070 is about 9369.6355318657. The cubic root of 87790070 is about 444.4420394083.

The spelling of 87790070 in words is "eighty-seven million, seven hundred ninety thousand, seventy".