87772275 has 48 divisors (see below), whose sum is σ = 170748000. Its totient is φ = 44052480.

The previous prime is 87772273. The next prime is 87772277. The reversal of 87772275 is 57227778.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87772273) and next prime (87772277).

It is not a de Polignac number, because 87772275 - 2¹ = 87772273 is a prime.

It is a super-4 number, since 4×87772275⁴ (a number of 33 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 87772275.

It is not an unprimeable number, because it can be changed into a prime (87772271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7651 + ... + 15299.

It is an arithmetic number, because the mean of its divisors is an integer number (3557250).

Almost surely, 2^87772275 is an apocalyptic number.

87772275 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

87772275 is a deficient number, since it is larger than the sum of its proper divisors (82975725).

87772275 is a wasteful number, since it uses less digits than its factorization.

87772275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7685 (or 7674 counting only the distinct ones).

The product of its digits is 384160, while the sum is 45.

The square root of 87772275 is about 9368.6858736965. The cubic root of 87772275 is about 444.4120079916.

The spelling of 87772275 in words is "eighty-seven million, seven hundred seventy-two thousand, two hundred seventy-five".