87200402 has 4 divisors (see below), whose sum is σ = 130800606. Its totient is φ = 43600200.

The previous prime is 87200401. The next prime is 87200411. The reversal of 87200402 is 20400278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20400278 = 2 ⋅10200139.

It can be written as a sum of positive squares in only one way, i.e., 71048041 + 16152361 = 8429^2 + 4019^2 .

It is not an unprimeable number, because it can be changed into a prime (87200401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21800099 + ... + 21800102.

Almost surely, 2^87200402 is an apocalyptic number.

87200402 is a deficient number, since it is larger than the sum of its proper divisors (43600204).

87200402 is a wasteful number, since it uses less digits than its factorization.

87200402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43600203.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 87200402 is about 9338.1155486533. The cubic root of 87200402 is about 443.4447276315. Note that the first 3 decimals are identical.

The spelling of 87200402 in words is "eighty-seven million, two hundred thousand, four hundred two".