78277950 has 72 divisors (see below), whose sum is σ = 211613688. Its totient is φ = 20744640.

The previous prime is 78277949. The next prime is 78277951. The reversal of 78277950 is 5977287.

It is an interprime number because it is at equal distance from previous prime (78277949) and next prime (78277951).

It is a super-2 number, since 2×78277950² = 12254874912405000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 78277896 and 78277905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78277951) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 88209 + ... + 89091.

It is an arithmetic number, because the mean of its divisors is an integer number (2939079).

Almost surely, 2^78277950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78277950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105806844).

78277950 is an abundant number, since it is smaller than the sum of its proper divisors (133335738).

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

78277950 is a wasteful number, since it uses less digits than its factorization.

78277950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098 (or 1090 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 78277950 is about 8847.4826928342. The cubic root of 78277950 is about 427.7727816861.

The spelling of 78277950 in words is "seventy-eight million, two hundred seventy-seven thousand, nine hundred fifty".