87540626 has 4 divisors (see below), whose sum is σ = 131310942. Its totient is φ = 43770312.

The previous prime is 87540623. The next prime is 87540641. The reversal of 87540626 is 62604578.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62604578 = 2 ⋅31302289.

It can be written as a sum of positive squares in only one way, i.e., 75672601 + 11868025 = 8699^2 + 3445^2 .

It is a super-2 number, since 2×87540626² = 15326722400943752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87540626.

It is not an unprimeable number, because it can be changed into a prime (87540623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21885155 + ... + 21885158.

Almost surely, 2^87540626 is an apocalyptic number.

87540626 is a deficient number, since it is larger than the sum of its proper divisors (43770316).

87540626 is a wasteful number, since it uses less digits than its factorization.

87540626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43770315.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 87540626 is about 9356.3147659749. The cubic root of 87540626 is about 444.0206987888.

The spelling of 87540626 in words is "eighty-seven million, five hundred forty thousand, six hundred twenty-six".