1978350 has 72 divisors (see below), whose sum is σ = 5442360. Its totient is φ = 475200.

The previous prime is 1978349. The next prime is 1978363. The reversal of 1978350 is 538791.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18096 + ... + 18204.

2^1978350 is an apocalyptic number.

1978350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1978350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721180).

1978350 is an abundant number, since it is smaller than the sum of its proper divisors (3464010).

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

1978350 is a wasteful number, since it uses less digits than its factorization.

1978350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 1978350 is about 1406.5383037799. The cubic root of 1978350 is about 125.5358331143.

The spelling of 1978350 in words is "one million, nine hundred seventy-eight thousand, three hundred fifty".