81826002 has 12 divisors (see below), whose sum is σ = 177289710. Its totient is φ = 27275328.

The previous prime is 81825983. The next prime is 81826021. The reversal of 81826002 is 20062818.

It is an interprime number because it is at equal distance from previous prime (81825983) and next prime (81826021).

It can be written as a sum of positive squares in only one way, i.e., 81378441 + 447561 = 9021^2 + 669^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2272927 + ... + 2272962.

Almost surely, 2^81826002 is an apocalyptic number.

81826002 is an abundant number, since it is smaller than the sum of its proper divisors (95463708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81826002 is a wasteful number, since it uses less digits than its factorization.

81826002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545897 (or 4545894 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 81826002 is about 9045.7726038189. The cubic root of 81826002 is about 434.1406419112.

The spelling of 81826002 in words is "eighty-one million, eight hundred twenty-six thousand, two".