87481406 has 4 divisors (see below), whose sum is σ = 131222112. Its totient is φ = 43740702.

The previous prime is 87481403. The next prime is 87481441. The reversal of 87481406 is 60418478.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 87481406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87481403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21870350 + ... + 21870353.

It is an arithmetic number, because the mean of its divisors is an integer number (32805528).

Almost surely, 2^87481406 is an apocalyptic number.

87481406 is a deficient number, since it is larger than the sum of its proper divisors (43740706).

87481406 is a wasteful number, since it uses less digits than its factorization.

87481406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43740705.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 87481406 is about 9353.1495230216. The cubic root of 87481406 is about 443.9205516206.

The spelling of 87481406 in words is "eighty-seven million, four hundred eighty-one thousand, four hundred six".