87240733 has 8 divisors (see below), whose sum is σ = 88644920. Its totient is φ = 85847040.

The previous prime is 87240731. The next prime is 87240739. The reversal of 87240733 is 33704278.

It can be written as a sum of positive squares in 4 ways, for example, as 1530169 + 85710564 = 1237^2 + 9258^2 .

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 87240733 - 2¹ = 87240731 is a prime.

It is a super-2 number, since 2×87240733² = 15221890988754578, 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 (87240731) 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, 15073 + ... + 20041.

It is an arithmetic number, because the mean of its divisors is an integer number (11080615).

Almost surely, 2^87240733 is an apocalyptic number.

It is an amenable number.

87240733 is a deficient number, since it is larger than the sum of its proper divisors (1404187).

87240733 is a wasteful number, since it uses less digits than its factorization.

87240733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 87240733 is about 9340.2747818252. The cubic root of 87240733 is about 443.5130828698.

The spelling of 87240733 in words is "eighty-seven million, two hundred forty thousand, seven hundred thirty-three".