84150840 has 32 divisors (see below), whose sum is σ = 252452880. Its totient is φ = 22440192.

The previous prime is 84150769. The next prime is 84150841. The reversal of 84150840 is 4805148.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 84150798 and 84150807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84150841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350509 + ... + 350748.

Almost surely, 2^84150840 is an apocalyptic number.

It is an amenable number.

84150840 is an abundant number, since it is smaller than the sum of its proper divisors (168302040).

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

84150840 is a wasteful number, since it uses less digits than its factorization.

84150840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701271 (or 701267 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 84150840 is about 9173.3766956339. The cubic root of 84150840 is about 438.2139027351.

Adding to 84150840 its reverse (4805148), we get a palindrome (88955988).

It can be divided in two parts, 841 and 50840, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 84150840 in words is "eighty-four million, one hundred fifty thousand, eight hundred forty".