84361840 has 20 divisors (see below), whose sum is σ = 196141464. Its totient is φ = 33744704.

The previous prime is 84361817. The next prime is 84361847. The reversal of 84361840 is 4816348.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 84361796 and 84361805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84361847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527182 + ... + 527341.

Almost surely, 2^84361840 is an apocalyptic number.

84361840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84361840 is an abundant number, since it is smaller than the sum of its proper divisors (111779624).

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

84361840 is a wasteful number, since it uses less digits than its factorization.

84361840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054536 (or 1054530 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 84361840 is about 9184.8701678358. The cubic root of 84361840 is about 438.5798565398.

The spelling of 84361840 in words is "eighty-four million, three hundred sixty-one thousand, eight hundred forty".