67578420 has 96 divisors (see below), whose sum is σ = 232904448. Its totient is φ = 14257152.

The previous prime is 67578409. The next prime is 67578431. The reversal of 67578420 is 2487576.

It is an interprime number because it is at equal distance from previous prime (67578409) and next prime (67578431).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 729 + ... + 11648.

It is an arithmetic number, because the mean of its divisors is an integer number (2426088).

Almost surely, 2^67578420 is an apocalyptic number.

67578420 is a gapful number since it is divisible by the number (60) 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 67578420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116452224).

67578420 is an abundant number, since it is smaller than the sum of its proper divisors (165326028).

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

67578420 is a wasteful number, since it uses less digits than its factorization.

67578420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12409 (or 12407 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 67578420 is about 8220.6094664569. The cubic root of 67578420 is about 407.3202589699.

The spelling of 67578420 in words is "sixty-seven million, five hundred seventy-eight thousand, four hundred twenty".