78401260 has 48 divisors (see below), whose sum is σ = 189068544. Its totient is φ = 26751168.

The previous prime is 78401251. The next prime is 78401269. The reversal of 78401260 is 6210487.

It is an interprime number because it is at equal distance from previous prime (78401251) and next prime (78401269).

It is a super-2 number, since 2×78401260² = 12293515139175200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (78401269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30547 + ... + 33013.

It is an arithmetic number, because the mean of its divisors is an integer number (3938928).

Almost surely, 2^78401260 is an apocalyptic number.

78401260 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78401260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94534272).

78401260 is an abundant number, since it is smaller than the sum of its proper divisors (110667284).

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

78401260 is a wasteful number, since it uses less digits than its factorization.

78401260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710 (or 2708 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 78401260 is about 8854.4485994329. The cubic root of 78401260 is about 427.9972850441.

The spelling of 78401260 in words is "seventy-eight million, four hundred one thousand, two hundred sixty".