87400511 has 8 divisors (see below), whose sum is σ = 96098304. Its totient is φ = 78828120.

The previous prime is 87400507. The next prime is 87400531. The reversal of 87400511 is 11500478.

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 87400511 - 2² = 87400507 is a prime.

It is a super-2 number, since 2×87400511² = 15277698646122242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87400531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29885 + ... + 32678.

It is an arithmetic number, because the mean of its divisors is an integer number (12012288).

Almost surely, 2^87400511 is an apocalyptic number.

87400511 is a deficient number, since it is larger than the sum of its proper divisors (8697793).

87400511 is a wasteful number, since it uses less digits than its factorization.

87400511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62701.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 87400511 is about 9348.8240436966. The cubic root of 87400511 is about 443.7836767142.

Adding to 87400511 its reverse (11500478), we get a palindrome (98900989).

The spelling of 87400511 in words is "eighty-seven million, four hundred thousand, five hundred eleven".