89102139840 has 672 divisors, whose sum is σ = 371793576960. Its totient is φ = 19144654848.

The previous prime is 89102139829. The next prime is 89102139923. The reversal of 89102139840 is 4893120198.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27355492 + ... + 27358748.

Almost surely, 2^89102139840 is an apocalyptic number.

89102139840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89102139840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185896788480).

89102139840 is an abundant number, since it is smaller than the sum of its proper divisors (282691437120).

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

89102139840 is a wasteful number, since it uses less digits than its factorization.

89102139840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369 (or 3356 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 89102139840 in words is "eighty-nine billion, one hundred two million, one hundred thirty-nine thousand, eight hundred forty".