83778450 has 96 divisors (see below), whose sum is σ = 240925056. Its totient is φ = 18869760.

The previous prime is 83778439. The next prime is 83778479. The reversal of 83778450 is 5487738.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76104 + ... + 77196.

It is an arithmetic number, because the mean of its divisors is an integer number (2509636).

Almost surely, 2^83778450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83778450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120462528).

83778450 is an abundant number, since it is smaller than the sum of its proper divisors (157146606).

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

83778450 is a wasteful number, since it uses less digits than its factorization.

83778450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 83778450 is about 9153.0568664245. The cubic root of 83778450 is about 437.5665422596.

The spelling of 83778450 in words is "eighty-three million, seven hundred seventy-eight thousand, four hundred fifty".