87840155 has 8 divisors (see below), whose sum is σ = 113516592. Its totient is φ = 64866528.

The previous prime is 87840131. The next prime is 87840187. The reversal of 87840155 is 55104878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87840155 - 2⁶ = 87840091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675629 + ... + 675758.

It is an arithmetic number, because the mean of its divisors is an integer number (14189574).

Almost surely, 2^87840155 is an apocalyptic number.

87840155 is a deficient number, since it is larger than the sum of its proper divisors (25676437).

87840155 is a wasteful number, since it uses less digits than its factorization.

87840155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351405.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 87840155 is about 9372.3078801328. The cubic root of 87840155 is about 444.5265426926.

The spelling of 87840155 in words is "eighty-seven million, eight hundred forty thousand, one hundred fifty-five".