81462402 has 96 divisors (see below), whose sum is σ = 223093440. Its totient is φ = 21893760.

The previous prime is 81462401. The next prime is 81462439. The reversal of 81462402 is 20426418.

It is a super-2 number, since 2×81462402² = 13272245879219208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (81462401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44077 + ... + 45887.

It is an arithmetic number, because the mean of its divisors is an integer number (2323890).

Almost surely, 2^81462402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81462402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111546720).

81462402 is an abundant number, since it is smaller than the sum of its proper divisors (141631038).

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

81462402 is a wasteful number, since it uses less digits than its factorization.

81462402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 81462402 is about 9025.6524417906. The cubic root of 81462402 is about 433.4966415372.

The spelling of 81462402 in words is "eighty-one million, four hundred sixty-two thousand, four hundred two".