1098624438 has 64 divisors (see below), whose sum is σ = 2581770240. Its totient is φ = 345729600.

The previous prime is 1098624433. The next prime is 1098624467. The reversal of 1098624438 is 8344268901.

It is a happy number.

1098624438 is a `hidden beast` number, since 10 + 9 + 8 + 624 + 4 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1098624393 and 1098624402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098624433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60631 + ... + 76637.

It is an arithmetic number, because the mean of its divisors is an integer number (40340160).

Almost surely, 2^1098624438 is an apocalyptic number.

1098624438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098624438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290885120).

1098624438 is an abundant number, since it is smaller than the sum of its proper divisors (1483145802).

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

1098624438 is a wasteful number, since it uses less digits than its factorization.

1098624438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16090 (or 16084 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1098624438 is about 33145.5040390096. The cubic root of 1098624438 is about 1031.8496434546.

The spelling of 1098624438 in words is "one billion, ninety-eight million, six hundred twenty-four thousand, four hundred thirty-eight".