87778070 has 32 divisors (see below), whose sum is σ = 166561920. Its totient is φ = 33255040.

The previous prime is 87778069. The next prime is 87778073. The reversal of 87778070 is 7087778.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87778073) 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, 12515 + ... + 18225.

It is an arithmetic number, because the mean of its divisors is an integer number (5205060).

Almost surely, 2^87778070 is an apocalyptic number.

87778070 is a deficient number, since it is larger than the sum of its proper divisors (78783850).

87778070 is a wasteful number, since it uses less digits than its factorization.

87778070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5800.

The product of its (nonzero) digits is 153664, while the sum is 44.

The square root of 87778070 is about 9368.9951435573. The cubic root of 87778070 is about 444.4217882664.

The spelling of 87778070 in words is "eighty-seven million, seven hundred seventy-eight thousand, seventy".