84154140 has 240 divisors, whose sum is σ = 310774464. Its totient is φ = 18662400.

The previous prime is 84154127. The next prime is 84154207. The reversal of 84154140 is 4145148.

It is a happy number.

84154140 is a `hidden beast` number, since 84 + 1 + 541 + 40 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 464850 + ... + 465030.

Almost surely, 2^84154140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84154140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155387232).

84154140 is an abundant number, since it is smaller than the sum of its proper divisors (226620324).

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

84154140 is a wasteful number, since it uses less digits than its factorization.

84154140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 84154140 is about 9173.5565622064. The cubic root of 84154140 is about 438.2196308894.

Adding to 84154140 its reverse (4145148), we get a palindrome (88299288).

The spelling of 84154140 in words is "eighty-four million, one hundred fifty-four thousand, one hundred forty".