78454950 has 48 divisors (see below), whose sum is σ = 222366720. Its totient is φ = 17932320.

The previous prime is 78454939. The next prime is 78454951. The reversal of 78454950 is 5945487.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78454951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36310 + ... + 38409.

It is an arithmetic number, because the mean of its divisors is an integer number (4632640).

Almost surely, 2^78454950 is an apocalyptic number.

78454950 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78454950 is an abundant number, since it is smaller than the sum of its proper divisors (143911770).

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

78454950 is a wasteful number, since it uses less digits than its factorization.

78454950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74741 (or 74736 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 78454950 is about 8857.4798899010. The cubic root of 78454950 is about 428.0949617513.

It can be divided in two parts, 78 and 454950, that multiplied together give a triangular number (35486100 = T₈₄₂₄).

The spelling of 78454950 in words is "seventy-eight million, four hundred fifty-four thousand, nine hundred fifty".